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Search: id:A159347
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| A159347 |
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Transform of the finite sequence (1, 0, -1) by the T_{0,0} transformation |
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+0
4
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| 1, 1, 1, 4, 10, 23, 53, 123, 286, 665, 1546, 3594, 8355, 19423, 45153, 104968, 244021, 567280, 1318766, 3065759, 7127025, 16568323, 38516678, 89540413, 208156206, 483904470, 1124941411, 2615171499, 6079536145, 14133206848, 32855719753
(list; graph; listen)
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OFFSET
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0,4
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COMMENT
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Without the two first 1s : A137531
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LINKS
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Richard Choulet : Curtz-like transformation
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FORMULA
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O.g.f f(z)=((1-z)^2/(1-3*z+2*z^2-z^3))*(1-z^2). a(0)=1, a(1)=1, a(2)=1, a(3)=4, a(4)=10 and for n>=2 a(n+3)=3*a(n+2)-2*a(n+1)+a(n)
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MAPLE
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a(0):=1: a(1):=1:a(2):=1: a(3):=4:a(4):=10:for n from 2 to 31 do a(n+3):=3*a(n+2)-2*a(n+1)+a(n):od:seq(a(i), i=0..31);
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CROSSREFS
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A137531
Sequence in context: A057750 A118645 A137531 this_sequence A102549 A008258 A008251
Adjacent sequences: A159344 A159345 A159346 this_sequence A159348 A159349 A159350
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KEYWORD
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easy,nonn
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AUTHOR
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Richard Choulet (richardchoulet(AT)yahoo.fr), Apr 11 2009
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